<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>选择结构练习</title>
</head>
<body>
    <span>中国大陆</span>&nbsp;&nbsp;&nbsp;
    {% if not user %}
        <a href="{{url_for('login',user='吕布')}}">亲，请登录</a>&nbsp;&nbsp;&nbsp;
        <span>免费注册</span>&nbsp;&nbsp;&nbsp;
    {% else %}
        <span> {{user}} </span>
    {% endif %}
        <span>手机逛淘</span>
</body>
</html>